182 Panama Shells. TROCHIDJE. 



Mean divergence about 33 ; length .085 inch ; breadth .05 

 inch ; length of spire .058 inch. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 



4 specimens were found in the calcareous sand. 



254. Cingula (?) terebellum. Nov. sp. 



Shell subcylindric : white: with four very prominent com- 

 pressed acute spiral keels, of which two are seen on the spire : 

 apex subacute : spire with the outlines moderately curvilinear : 

 whorls six, slightly convex, with an indistinct suture ; last 

 whorl small : aperture small, ovate, acute above : labrum thin : 

 labium indistinct : umbilicus wanting. 



Mean divergence about 28 ; length .08 inch ; breadth .04 

 inch; length of spire .055 inch. 



Station. Unknown. 



Habitat. Panama ; C. B. A. ! 



1 specimen was found in the calcareous sand. 



255. Cingula (!) ttirrita. Nov. sp. 



Shell conic, elongate : white : with numerous prominent com- 

 pressed transverse ribs, which terminate a little above the su- 

 ture, where they are crossed by a spiral raised line ; anteriorly 

 with two or three spiral ridges : apex acute : spire with the out- 

 lines nearly rectilinear : whorls six, above abruptly shouldered, 

 planulate, with the suture in a broad groove, which is continued 

 along the periphery of the last whorl : aperture small, ovate, 

 acute above, very slightly effuse : labrum thin : umbilical region 

 with a very minute indentation. 



Mean divergence about 30 ; length .08 inch ; breadth .033 

 inch ; length of spire .024 inch. 



Station. Unknown. 



